Superheater.



PATENTED MAR. S, 1908 J. M. MOCLELLON.

SUPERHEATER.

APPLIGATION FILED JAN. so, 1905.

4 SHEETS-SEEN 1.

No. 880,52.- PATENTED MAR. s, 1908.

J. M. MGCLBLLON.

SUPERHEATBR.

APPLICATION FILED JAN. so, 1905.

4 SHNS-SHEET 2.

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PATBNTEDMAR. 3, 19o8.

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P-ATENTED MAR. 3, 1.908.

J. M. MGGLBLLON.'

SUPBRHBATBR. APPLICATIO FILED IAN. 30, 1905.

4 SHEETS-SHEET 4.

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e enanas es and orrenda.

AMES' M! MCCLELLON, OF EVElStET'I,y MASSACHUISFTTSla SUPEEHEATER .1^

No seance:

`- specification or Lette-rs Patent Application .filed January u30. 1905. Serial No. 243.3563.

T all. twhoml it may concern."

- Bedtlknown. that I, JAMES M. MCCLELLON, afcitizen..of.-the United States, residing at Everett, county otMiddleseX; and .State of. Massachusetts, havefinvented ari-Im rovement .inuperheateraof which the to owing description,. in 'connection .with the accompanying drawings, is aspeciiication, like let- 'bustiion operatingto su erheat-.the steam durin .its passage throng rthe superheating cham.'er. In applying my invention to a locomotiveboiler, I place this chamberwithin theshell .of .the boiler and preferably extendit from the fire-box to the smoke-chainb'er: Within the shell are either 'fines through? which products of combustion pass from the fire-box-to thc smoke-chamber, or stearnpi es throughwhich the steam/passes.

1products ofl combustion` through the superleatmg chamber the arrangement is such' thatthe space within the chamber ilround the iiues is filled with steam, which steam l becomes superheated bythe heat radiating from the' fines.` W'here the steam-pipes are 'taken through the chamber, l pro ose to connect the-chamber directly with, t ie ire b'ox and smoke-chamber so that 'the hotl products of combustion by passing through the chamber superheat the steam within the ste am-pi pes.

Referring no iv to the drawings, Figure 1 is Ia vertical central section of a locomotive boiler having my improved superheater' applied thereto; F 1g. 2 1s a section on the liney y-Jy, Fig. 1; Fig. 3 is a sectiorfon the line a.-a-, Fig. 2,. the flues being omitted, Fig. 4 isa vertical central section of a different type 'off-locomotive from that shown in Fig. 2 having one form of my improved superheater applied thereto; Fig. 5 is a' section on the line l,--b, 4; Fig: 6 shows a modification of ues lare used for conducting the' the arrangement shown in Egret, Fig. j7"is"a. section of' a modified form of boiler 0n sli-hei stantially a line. correspond'irigwto v`theelii'e.

c-c, Fig. 4; Fig., Sis a verticalcentralgvieiv 60 ofa boiler having another form of supere heater embodying my invention applied. thereto; Fig. 9 shows a modification; l`.,`i,f?,.li)r is a section on the line d-d,' Fig-8; F ll is. a vertical section offa locomotivefboler having still another form ot Asuperh'eaten-'ein.-.-

bodying my invention applied thereto ,wlig

1'2 isla section on the line eY-e, Fig. '11. n

In all the forms.- oi the inventionihe'reirr shell a superheating sharnber which entends' ylongitudinally thereof, and- Withinwhich" chamber'the steam is superheatedby prode. ucts of combustion' which are passed through the chamber. n

Referring first to Fig. 1 Where my; in.- proved superheater is shown as used in conf nection with an ordinaryT locomotive boiler,

3 designates .the shello'il the boiler, 4 th'e'combustion chamber, 5 the usual' croWn-`sheet 30 extend through the Water in the 'sh'ell 3 and conduct the products of combustion from the :shown I have arranged Within the boiler fire-box to thesmoke-chamber. vThies'e-parts 85 `may be of any suitable or usual construction;

In applying my improved superheater. to this type of boiler, I piace within the shell?, a drum 8 which extends from the frontflesheet 9 back to or nearly to the-reboxe, 9o.

and which forms I a superheating chamber. within Which the steam 1s superheated. The constructional details of this drinn or superheating chamber and the manner ot 'arran f.-

ing it within the boiler may varied accor 95 ing to the type of' boiler toavhich my supereA heater is applied. es shown in F l drum 8 has within it a smaller drum 1G, which is spaced therefrom and. which.l vis secured thereto at its ends, as at 12.

The front end ot the drum 8 is connected directly to the front flue sheet 9, andthe rear end is connected to the rear Wall 13 -ofla dome 14 supported on the crown-sheet 5 and communicating with the combustion cham' 105 ber 4 'of the fire-box. Extending through the smaller drum 1() are a plurality of hies 15 which open at one end into the dome 141. and at the other end into the smoke-chamber 6. The drum 8 is provided .with an inlet 110 opening 17 which extends partially-intoV the usual steam. dome 18 so that steam from the space between the drums 8 and 10.

dome can enter the inlet and pass into ,lte

e inner drum 10 is provided at its front end and on its underside with an opening 19, and its front end is divided into two compartmentsvby the horizontal partition 2,0.

21 designates a steam-pipe extending into the inner drum and nearly to the rear end thereof, said pipe passing through the front iue sheet 9 into the smoke-chamber and being connected to any suitable or usual throttle-valve 22. The stern A23 of the throttle-valve is shown as extended through said steamipe 21 and through the dome 14 to the reox end of the boiler where it is connectedto any suitable throttle-lever.

The partition 20 has the centrally located extension 24, see Fig. 3, which extends nearly to the right hand e'nd of' the drum 8.

When the boiler is in operation part ofthe products of combustion ass into the dome 14 and from the dome t rough the ilues l15 to the smoke-chamber 6, it being understood that the main portion of the hotgases pass to the smoke-chamber through othe usual ilues 7. As the steam is formed it passes to the steam-dome 18, and passes from there into the space between the two'drums, from which space it passes through the opening 19 into the inner drum, and because of the ar' rangement of the partition 20 therein said steam passes backwardly or to the right beneath said partition, and then up around the sides of the extension 24 to the u per com artment of said inner drum, om whic upper 'compartment it passes into the steam-pipe 21 and thence to the throttle-- valve. During the backward movement of the steam through the lower compartment of the inner drum and during its movement up around the extension 24 it is in engagement with the iiues 15 through which hot.

products of combustion are passing and thus ecomes superheated. p

In Fig. 4, I have illustrated one form of my improved superheater as applied to a boiler such as shown in my co- )ending application, Se. No. 216,315, tiled uly 13, 1904. This ty )e of boiler comprises a shell Bwhich is to be kept filled with water, and steam-generating s aces 26 around the sides and top 'of the ireox 4a, said steam-generating spaces' being y connected to a steam- `drum 27 in"some suitable way, as by means sie ofnfipples'28, and also being connected to the interiorof the shell 3a so that the water from the shell 3 is forced into the' steamgenerating spaces where it is converted into steam, and the steam then passes intothe steam-drum 27. In this embodiment of my invention there is located within the shell 3a a drum '8a which forms the superheating chamber, said drum extendin from the front 'flue sheet 9 back to the iireox, referably to the rear flue sheet 280. xtending through this drum 8a are a plurality of ilues 15a which 'open at one end into the combustion chamber and at the other end into the smoke chamber 6a, so that a part of the products of 'combustion pass therethrough, the major portion ofthe products of combustion,

however, passing through the usual flue 7u.

The steam-drum 27 is divided into compartments 29 and 30 by a suitable artition 3-1, and the compartment 29 in w lich the steam irst collects as it is generated in the steam-generating spaces 26, is connected to v the superheating chamber in some suitable way, as by means of a nipple 32. Within the superheating chamber is a partition or baiileplate 33 dividing said chamber into compartments 34 and 3K5, and extending'forward from said partition 33 is a pipe 36 through which the steam passesfrom the compartment 34 to the compartment 35. Said pi e extends nearly to the forward end of tiie compartment 35 and may be provided with lateral openings 37, if desired. partment k35 of the superheating chamber communicates with the compartment 30 of the steam-drum in some suitable Way, as through a nipple 38. Within said compartment 30 is any suitable orfusual throttle# valve 22a from which extends a steam-pipe 39 leading through the superheati chamber, and extending to the cylinders o the engine. In this form of the invention, it will be seen t'hat the steam which is generated in the steam-generating spaces 26 passes to the compartment 29 of the steam-drum, from which it passes into the compartment 34 of .the superheating chamber.

While within said compartment, said steam. is artially dried by the heat radiating from tie front end of the iiues 15, and said steam thenpassesthrou h the steam-pipe 36 to the forward end o lthe compartment 35 of the ysuperheating chamber, and thence passes backwardly through said compartment to the compartment 30 of the steam-drum. During itsbackward movement within the compartment 35, itisn brought in contact again with the flues 15a, and is still further dried and superheated. In this form of the invention, as well as in the one shown in Fig. 1, it has been my aim to cause the steam to travel the full length of the iues, While said steam isr in the superheatin chamber,there by to get the greatest possi le superheating effect. r

In Fi 6, I have shown a slight modification oft e invention shown in Fig.. 4. In the latter figure, it will be noted that the su erheating chamber extends clear to the uesheet 280. In order to prevent any dan rer: ofthe Hue-sheet becoming overheated at t iis point, I. ma interpose a water-space between said ue-sheet 28() and the adjacent end of the superheating chamber, as shown in Fig. 6, wherein the end of the superheat- The comf box.' T 11e type oi boiler herein'illustrated is.

- with the conmartmenty 30l"`of-the steam-" 'i lects .in the compartment 29b'off-the steami compartment '34h of .the superheating'. cham-v "280,2as' at 40, so as to'prevent said end ofthe `Water Within thel shell' 3b is forcedr into the -into the compartment 29b of the steamedrum 27 through suitable nipples 28h.

.The steam-'dimm 27b is dividedby the parti' ber, the steam is broughtinto contactwith ferent form of the invention whereinthe ing chamber is spaced' from the ilue-sheetsuperheating chamber or the flue-sheet from being burned out. Y

ln F ig.- 8, `l'have shown still'anotheremvention7 3b is the boiler-shell having theiorf. dinary llues 7b passing therethrough. bis a* the steam-*generating spacesaround'vthe 'fire similar to that shown in Fig. 4,' that isjthe steam-Creneratino' s aces 26b Where itv is z: b l generated into steam, and the steam passes The superheating' chamber is formed Within adrum'SbWhich extends from the fluesheet 280i forward part Way to the frontluesheet Qbf Extending" through this superheating ohamberare a plurahty'of flues 15b. throughwhch products of combustion passfrom vthe rire-box to th'e' smoke-chamber.

tion'lb into the compartments 29.1 and 305, andthe superheating chamber is yalso di vided by a partition 33h into two compartments 'geband 35D. The compartmen'tl 34h. communicates -With the compartment 29h of the steam-drum through a suitable nipple or nipples 32b`yand' the compartmentv 35? of the y superheating chamber vhas. kcommu nication drumV through a suitable'inipplegor nipplesv SSbQThe partition 331 inthe superheating chamber has anv opening' thereinfas seen best in Fig. 10, sothat' the steam which coldrum passes' through rthenipple 321? into' the ber, and thence passes through theopeninv` 4l linto the compartmenty 35h, from Whic it passes'to the eomp'artment'BO? ot" the steam-drum. During; its passage through the compartments of the superlieating cham the. tlues 15b, and heated.

Y 2b designates any usual or suitable throt` tlc-valve which admits the steam to the, steam-pipe 39h from which pipe steam is oon-., ducted to the cylinders of the engine. The steam-pipe 39h is'protected from the cooling effect of the Water `within the chamber 3" by a protector-pipe 42. which extends between. the superheating chamber and the front flue-sheet 9* and surrounds that portion of the steam-pipe outside of the superheating chamber. v In Fig. 9, l have illustrated a slightly difthereby `becomes super .rectlyfromv the superheatingy chslinber.

'livered 'to'.,saiel/ compartment 29",A

perhe'ati invention :herein illustr vWithin thefilre-box of `thelocomotivfe extra suplgrheatingchamber is s aeed-'jfrom=1the rontiue-sheetpand theft ottleavalve is located Within. the-smokeehamber instead bt'within thestjeamedrum. *In 'said figure, v280e'designates'the iluesheetA adjacent the bodiment of my invention wherein the superi-.1J "aheatiug chamber extends only part ,fyw'a through the shell of the boiler." In said' in fire-box 4, 7C are the usual lues extending cvVsthe steam-drum' into which the steam *passes from the steam-generating spaces 26. smokelchainber, 9b' the front flue-sheet, 2580?.' the rear ilue sheet, Il" the fire-box, and 26 The steam-generating chamber is formed by av'drum 89 Within the shell of the boiler,v and passing through said' superhe'ating' chamber [are a plurality of lues 15c through which' hot products of combustion pass to"-the smoke-chamber. The superheatingi'eham- .ber is spaced from the flue-sheet 280?, asj at .40, so that'the Water Whichpoccupies-said space Will prevent the extreme heat in the combustion chamber from burning out the through the shellv 3 and extending from the {hallalsheet280c to the frontline-'sheet 9% and end of the superheating chamber or the -iluesheetfV The v throttle-valve 22e-is, in `this form of the invention, located Within the smoke-'chamber` 6, `and steam is. taken di- In this form otheinvention. the steainie'superheated' Withingthe superheating chamber beforejitl isdfelivered to the throttle-valvelby being'brou'ght into Contact with the fluesf 15.

'In Figs. yjll "and 12,1 have 'illustrat'edstill anotherwa in .Which my invention maybe embodied.` .the boiler 'hereinfillustratem 3d is the Ashe ofthe boiler having the smokechamber 6d at one endfofjthe boilerv andthe yfire-box 4;@vv ati-'theo'therQand'7d are the usual `lues ci)Iin'ecting'iv the smoke-'chamber andreboing. Surrounding-'the fire-box are steam genelatingj.sp/ aces` 26d rwhich Communicate `withthe'conipartm'ent 29?1l ofthe steam-drum 27d, so that 'the steamwvhich is generated Wi thin saidj steam#generatingl spaces' is dethe `lpartition 351, as thi vention l:last descri-bed;

Within.

superheatijngpipes 46,whichopen at one end y i into the suplhe'ating chamber, and at the other end into a steam-A chamber 47 which hask communication with the compartment 29l'of.the"steam-drum. The superheating chamber communicates With .the .compart- `ment l30d of the steam drum through any smoke-chamber 6, In this form of the invention the steam which is generated in the steam-generating spaces of the boilerl accumulates in the compartment 29d of the steam drum, passes from thence into the space 47, and thence. through the superheating-pipes 46 into the superheating chamber. From the superheating chamber the steam passes into the compartment 30 of the steam-drum, from which it is taken to the engine-cylinders. llerein the steam is partially superheated in the pipes-46 by the direct action of the hot gases in the combustion ehamber,'and is further superheated Within I the superheating chamber by the action of the ilues 15d.

In Fig. 12, which isa section on the line e-e, the nipples 47, forming a communica-l tion between'the interior of the shell 3d and the steam-generating spaces 26d, are shown.

I n the forms of the invention thus far described, the steam 1s admitted directly to the 4 superheating chamber and is superheated therein by hot gases in ilues extending through said chamber.

In Ilig. 7, I have illustrated another arrangement of superheating chamber. In saidD ligure, which is a cross section through a boiler on a line corresponding to the line c-e, Fig. 4, 3h designates the shell of the boiler, and 27 the steam-drum. The super- ,heatingv chamber is the space 60 above a horizontal partition 8h extending across the upper end of the shell 8h, the space below said partition being filled With water and the space abovebeing filled with steam. Said super-heating chamber 60 communicates with steaungenerating spaces around the fire-box in some suitable way, and extending through said'superheating chamber vare a plurality of the steam is admitted to the drum from the steam-generating spaces, and the point where the steam is delivered from the drum to the superheating chamber, said baffle-plate operating to prevent any water in the steam from being carried over into the superheating chamber.

ln Fig. l, I have illustrated a sleeve or pipe 62 as extending through the dome 14, through which pipe or sleeve the throttlevalve stem 23 passes. This sleeve 62 can be expanded into the sides of the dome to make a tight joint, and thus prevent any leakage regulated aswdesired.

around the valve-stem. In this form of the invention, the valve-stemlwould be packed, as at 64, where it emerges from the shell. 66 designates a valve which may be placed in the partition in the steamdrum, and by means of which more or less saturated steam from the compartments 29, 29", 29d, etc. may be delivered to the other compartment of the steam-drum in case it should happen that the steam was superheated beyond the desired point in passing through the superlieating chamber. By conducting more or less saturated steam directly through the partition in the steam-drum the temperature of the steam used in the cylinders may be This valve 66 may be operated by any suitable valve-stem extended to the eab 'of the engine.

In all the above-described forms of my invention, I employ a superheating chamber within the shell of the boiler through which chamber the steam is taken and Within which chamber said steam is heated by the action of hot gases which are also passed `through the chamber.

Althou h I have illustrated'my invention` as appliei to locomotive boilers of different j types, it will be observed that the invention is'not limited to its use with locomotive boilers, but may be applied to any steam- Having fully described my invention, what I claim as nea7 and desire to secure by Letters Patent is 1. In a locomotive boiler, a shell having-a smoke-chamber at one end and a fire-box at the other, a superheating chamber located entirely within the shell, means to7 admit the steam into the superheatin chamber, means to superheat the steam whi ein the chamber, and a pipe, a portion of which is located within the shell, to .convey the superheated steam from said chamber to the engine cylinder, said pipe being separate 'from the means to superheat the steam and from thesu er heating chamber, the portion of the pipe t at is located within the shell being protected from contact 'with the Water.

v 2. In a locomotive boiler, a shell having a smoke-chamber at one end and a fire-box at the other, a horizontal superheating chamber within said shell above the normal water level therein, and lues extending longitudinally of the shell and all opening at one end into the fire-box and at the other end into the smoke-chamber, a portion of said ilues passing through the superheating chamber.

3. In a locomotive boiler, a shell having a. smoke-chamber at one end and a {ire-box at the other, a horizontal su perheating chamber within said shell above the normal vvater level therein, llues extending longitudinally of the shell-and all opening at one end into thc {ire-box and at the otier end into the smoke-chamber, a portion ofsaid ilues passing through the Superheatingchamber, and a pipe to convey superheated steam from said superheating chamber to the engine cylinders, said pipe bein protected from contact. with the Water in t e steam `and Water chamber.

4.. In a locomotive boiler, a shell, a smokechamber at one end of the shell, a-fire-box at the other end thereof, a superheating chamber within the shell, a lon itudinally extending drum exterior tothe s ell and communicating both with the steam and .water spaces .ofthe boiler and with said superheating chamber, and rneans Within the superheatng chamberto superheat steam.

1.5911111. locomotive boiler, a shell, a smoker.

'chamlier ajt.one endof.' the shelL, a. fire-box at theiother end, a superhe'ating-chamber -Withirjthe. shell, a drr'n exteriorto .the :shell and communicating .Withthe steam zo andlwater spaces of the boiler, said drum also` communicating with the 'superheating chamber, --and iuesextending throu'h thel Shelli-and communicating at one .en with()I theireelox and atthzother end with the ing through the superheatingfchamber.

smoke chamber, a portion of said iues 6. In a locomotlve boiler, a shell having a fire-box at one'end and a smoke-chamber at the other end, a superheating chamber Within the shell, a drum exterior to the 30 shell, a partition extending across the drum` and dividin ments, one ofl which communicates othr with the `superheating chamber and' the steam spaces of the boiieryand the other of 85,

which communicates with the superheating.- chamber, and fiues communicatin endwith the fire-box and at the ot er with the smoke-chamber, a portion ofsaid fines.

extending through the superheating chamber. 40

In testimony whereof, I have signed my name to this specification, in the presence of ytwo subscribing Witnesses. l

JAMES M. MCCLELLON.

1 -Witnessesz L A' -LoUrs -.C. SMITH,

BERTHA F. HEUSER.

pasrs- 25 it into two com artat one 

